>> investigators just told us another two more days. that is how long it's going to take searchers to get through the piece of traffic that has come in here from herk you'll ease over the course of a five-day period thchl sk done by volunteers who are here at this landfill on their labor day holiday. for the fourth day, trucks went into the keller canyon landfill but not much in the way of clues came out. >> they're hoping to get to the last piece of debris. >>> a team of 20 tipped through 3,000 pounds of trash in the hunt, police say they did find one lead late yesterday. >> the only thing they've found is a piece of letterhead with a hercules address on. it's not related to this case. >> it's not much but enough to confirm they're searching in the right place. the one acre area is where trash was dumped. preem bli the same trash from the business park where he once worked and a car he drove was discover add band oned. police believe they're part of a complex east bay killing spree at the hands of valdemoro. the father and son rented r